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03-11-2011, 07:48 AM
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#1
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Name: thirdstreettito
Title: Peacemaker
Status: Not Here
Join Date: Mar 2011
Location: Angier, NC, USA
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Posts: 40
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Strong 6-speed?
I plan on running a 6-speed manual in a D350(2wd) Cummins with 500-800hp. I've considered the ZF6, the G56, and the NV5600. Which one can handle it? What are some good upgrades? I see all of these high hp trucks running autos and I'd much rather have a manual. Thanks, Bradley
__________________
~Bradley~
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03-11-2011, 07:56 AM
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#2
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Name: jaybuller
Title: USCG MK
Status: Not Here
Join Date: Mar 2009
Location: Traverse city, MI
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Posts: 1,446
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I think a nv5600 with custom builit shafts and custom cut billit gears would hold 800hp reliably. but you would have to know someone that can make that stuff for you. a stock nv5600 with a big input will hold over 500 pretty easly but dont excpect to be doing power shifts or drag racing with it, sled pulling it should last at over 500 no problem but shifting uder power im sure it will bust.
__________________
1997 4x4 5 speed 12v sold
2002 f250 7.3 sold then totaled
1995 2wd auto 12v sold
1997 4x4 auto 12v sold.....
1989 K5 Blazer 4x4. ppumped 4bt cummins/nv4500sold
2001 X 4x4 7.3 stroker
05 2wd 1500 ram..12v 4500 4x4 swap underway
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03-11-2011, 08:03 AM
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#3
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Name: Signature600
Title: THA MAN!
Status: Not Here
Join Date: Aug 2006
Location: Jeffersonville, Ohio
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Posts: 11,961
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If you're just going to drive it, I know the NV5600 will hold that in a 2wd truck...even the G56 should. I don't know about the ZF6, just not familiar with them.
Custom shafts and gears in a NV5600?? $$$$$$$$$
Chris
__________________
THANKS TO:
Tim Barber @ TRE Diesel
Jeff Mumau @ Mumau Diesel Service
Rip @ Source Automotive
Don Thuren @ ThurenFab Suspension
Columbus Diesel Supply
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03-11-2011, 08:14 AM
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#4
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Name: zstroken
Title: For $$$ your name here
Status: Not Here
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Location: Western Michigan(by the lake)
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Posts: 23,151
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I was thinking the NV5600 held up well except for the 6th gear with high HP.
__________________
2008 4x4 Megacab, 68RFE
97 Dodge gone....
24V P-Pump Mafia member #1(retired)
Thanks to Mumau Diesel, Goerend Transmission, Northeast Diesel Service!
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03-11-2011, 08:16 AM
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#5
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Name: Signature600
Title: THA MAN!
Status: Not Here
Join Date: Aug 2006
Location: Jeffersonville, Ohio
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Posts: 11,961
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Quote:
Originally Posted by zstroken
I was thinking the NV5600 held up well except for the 6th gear with high HP.
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On the pulling track at 8K lbs too
Chris
__________________
THANKS TO:
Tim Barber @ TRE Diesel
Jeff Mumau @ Mumau Diesel Service
Rip @ Source Automotive
Don Thuren @ ThurenFab Suspension
Columbus Diesel Supply
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03-11-2011, 08:19 AM
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#6
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Name: not enoughsmoke
Title: floatin in tha gulf
Status: Not Here
Join Date: Dec 2008
Location: tenn
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Posts: 5,729
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hands down nv5600 sled pulled for 2 years on mine not one problem pulling 5th low and several dyno runs as well i have made 840hp
__________________
1995 F350 Powerstroke
1995 F350 Fummins
1995 F250 lightning clone
1968 Fastback GT
2003 F150
1994 F350 IDIT
1988 F350 IDIT
2003 Dodge 2500
1999 F250 Powerstroke
1993 F250 Fummins
1979 F350
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03-11-2011, 08:26 AM
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#7
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Name: thirdstreettito
Title: Peacemaker
Status: Not Here
Join Date: Mar 2011
Location: Angier, NC, USA
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Posts: 40
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Thanks guys. Whats the GVWR on the NV5600? The truck will be a DD, some drags, plenty of towing, and some sled pulling. And I have a heavy foot and love goin through the gears. You guys positive on the NV5600?
__________________
~Bradley~
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03-11-2011, 10:42 AM
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#8
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Name: ENafziger
Title: Too Much Time
Status: Not Here
Join Date: Oct 2008
Location: Knoxville, TN
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Posts: 843
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Since the D350 is going to be a couple thousand pounds later than any of the later model quad cab 4x4s, I'd say either the NV5600 or the G56 would be fine. From what I understand, the main concern with the G56 is case flex, since it's aluminum. Mike at Lazarsmith offers a good looking girdle to address this.
I have run a G56 for just over 100k miles, much of the time at the 625 - 650 hp level. My truck weighs in at 9025 pounds empty, and I've not had any problems.
That being said, if your mating the G56 to a 12-valve, the more heavily biased low rpm torque pounding may not make the transmission very happy.
--Eric
__________________
2006 Dodge 3500 SRW, 62/476 twins, Flux 2.5s, G56, Carli 2.65s, etc. Jer. 33:3
2003 Ford Excursion, '97 Cummins P-Pump, HX35/475 twins, studded and o-ringed, ZF6/271, forged Rickson 19.5s.
1991.5 W250, NV4500, Rickson 19.5s, HE351, long travel suspension build
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03-11-2011, 10:49 AM
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#9
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Name: roachie
Title: Taco Master
Status: Not Here
Join Date: Nov 2007
Location: East TN
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Posts: 11,133
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I vote ZF6 if its an open table.
__________________
99 F250____sold (to a ninja)
01 F250____Mexican F150
04 F350____Fat boy
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03-11-2011, 11:44 AM
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#10
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Name: LReiff
Title: The Antistock
Status: Not Here
Join Date: Apr 2009
Location: Newburg, PA
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Posts: 9,201
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Quote:
Originally Posted by thirdstreettito
Thanks guys. Whats the GVWR on the NV5600? The truck will be a DD, some drags, plenty of towing, and some sled pulling. And I have a heavy foot and love goin through the gears. You guys positive on the NV5600?
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It's not about the GVWR rating. What you need to consider is the transmissions torque rating. 550ftlb.
__________________
Lee
Quote:
Originally Posted by 4x4dually
If anyone thinks the internet is serious they should seriously log off and burn their laptop.
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03-11-2011, 12:07 PM
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#11
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Name: 8UPRACIN
Title: Diesel Enthusiast
Status: Not Here
Join Date: Dec 2008
Location: Coos Bay, OR
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Posts: 236
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I have the NV5600 in mine with 5 years of abuse over 500hp. I daily drive it, drag race, tow, and currently make over 600hp. I lost 1 main shaft cause the tip bearing failed and other than that is got 153k on it and just has some slight bearing noise when you lug it really hard.
__________________
CHRIS
1999 Monster VP, Injectors by ii, Aurora Compounds, 10.44@129.06. 849/1456 and 1083/1914 on nitrous. Thanks to Siskiyou Diesel Perf, ATS Diesel, EDGE, Opti-Lube, Industrial Injection, Icebox Perf, FASS, Fluidampr, JGS fab, Proven Perf, ZEX, Quadzilla
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03-11-2011, 12:30 PM
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#12
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Name: kino_fab
Title: KTPA Tech Official
Status: Not Here
Join Date: Aug 2007
Location: Glasgow, Ky
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Posts: 2,244
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only real problem i see with the nv5600 is 6th gear and the end of the main shaft breaking. Most pullers run the low side of the t-case to help prevent this, but in a 2wd situation, idk if the main shaft will hold in stock form. Screw it, go with an air shifted lenco and be happy lol.
__________________
04.5 3500 daily driver/ex-sled puller - On the operating table
Tech Official for:
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03-11-2011, 01:56 PM
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#13
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Name: Signature600
Title: THA MAN!
Status: Not Here
Join Date: Aug 2006
Location: Jeffersonville, Ohio
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Posts: 11,961
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Quote:
Originally Posted by ENafziger
That being said, if your mating the G56 to a 12-valve, the more heavily biased low rpm torque pounding may not make the transmission very happy.
--Eric
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I would say the CR is the torque king at the moment...sure, some 12v's do, but the RPM limited CR makes some serious torque....
Chris
__________________
THANKS TO:
Tim Barber @ TRE Diesel
Jeff Mumau @ Mumau Diesel Service
Rip @ Source Automotive
Don Thuren @ ThurenFab Suspension
Columbus Diesel Supply
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03-11-2011, 02:58 PM
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#14
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Name: thirdstreettito
Title: Peacemaker
Status: Not Here
Join Date: Mar 2011
Location: Angier, NC, USA
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Posts: 40
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Quote:
Originally Posted by ENafziger
Since the D350 is going to be a couple thousand pounds later than any of the later model quad cab 4x4s, I'd say either the NV5600 or the G56 would be fine. From what I understand, the main concern with the G56 is case flex, since it's aluminum. Mike at Lazarsmith offers a good looking girdle to address this.
I have run a G56 for just over 100k miles, much of the time at the 625 - 650 hp level. My truck weighs in at 9025 pounds empty, and I've not had any problems.
That being said, if your mating the G56 to a 12-valve, the more heavily biased low rpm torque pounding may not make the transmission very happy.
--Eric
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Dont just say neither is fine and not give a solution. Why would the NV5600 not be fine?
Quote:
Originally Posted by roachie
I vote ZF6 if its an open table.
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Open table? Please explain your opinion.
Quote:
Originally Posted by LReiff
It's not about the GVWR rating. What you need to consider is the transmissions torque rating. 550ftlb.
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If the trans is rated at #5000 I dont want it, it would barely be allowed to move the truck, let alone a trailer also, thats why I asked. The NV4500 for example is rated at #26000 GVWR
Quote:
Originally Posted by kino_fab
only real problem i see with the nv5600 is 6th gear and the end of the main shaft breaking. Most pullers run the low side of the t-case to help prevent this, but in a 2wd situation, idk if the main shaft will hold in stock form. Screw it, go with an air shifted lenco and be happy lol.
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Whats wrong with the 6th gear? How could I beef up the mainshaft? Lenco, no thanks.
__________________
~Bradley~
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03-11-2011, 03:49 PM
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#15
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Name: ENafziger
Title: Too Much Time
Status: Not Here
Join Date: Oct 2008
Location: Knoxville, TN
Member`s Gallery
Posts: 843
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Quote:
Dont just say neither is fine and not give a solution. Why would the NV5600 not be fine?
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Hey there, I said EITHER would be fine...not NEITHER.
Spend some time searching here. Jason Czarak sp? cryoed some of his internals with good results. Mike at Lazarsmith is very knowledgable on the G56s and has upgrades available, and is working on the Gorilla internals. Contact Standard Transmission and talk to them a little.
Oh, and as menioned above, don't worry about the GVWR, worry about torque ratings. I, too, used to think like you. I ruined a gearbox rated for 30,000 lb gvwr with a little old 9,000 pound truck...making 1200 ft-lbs of torque!
Have a great weekend!!!
__________________
2006 Dodge 3500 SRW, 62/476 twins, Flux 2.5s, G56, Carli 2.65s, etc. Jer. 33:3
2003 Ford Excursion, '97 Cummins P-Pump, HX35/475 twins, studded and o-ringed, ZF6/271, forged Rickson 19.5s.
1991.5 W250, NV4500, Rickson 19.5s, HE351, long travel suspension build
Last edited by ENafziger; 03-11-2011 at 03:56 PM.
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04-11-2011, 08:46 PM
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#16
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Name: inline
Title: Professional lurker
Status: Not Here
Join Date: Apr 2011
Location: Rhode Island
Member`s Gallery
Posts: 808
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2WD!!!!!!!!!! time to think outside the box. Fuller makes a 6 speed actually you could bolt up any SAE#2 trans behind a Cummins
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04-11-2011, 08:57 PM
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#17
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Name: RJM06590
Title: What to do
Status: Not Here
Join Date: Dec 2009
Location: Middletown, DE
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Posts: 1,913
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Quote:
Originally Posted by roachie
I vote ZF6 if its an open table.
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Agreed, the zf's shift very nicely especially with a short throw kit and handle some abuse.
Quote:
Originally Posted by thirdstreettito
Open table? Please explain your opinion.
If the trans is rated at #5000 I dont want it, it would barely be allowed to move the truck, let alone a trailer also, thats why I asked. The NV4500 for example is rated at #26000 GVWR
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I believe he said open table because of cost. You will need an adapter plate etc.
My zf5 is only rated to 4XXft lbs, it's been over 1000ft lbs for a long time. Ratings are safety nets for the manufacturers.
__________________
95 Fummins, 'Keep Em Cummin'
93 Ford F250 plow truck
<Theoretic Designs! Thank you!
http://robsdiesel.com/
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04-11-2011, 10:55 PM
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#18
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Name: jlibert
Title: Too Much Time
Status: Not Here
Join Date: Jun 2007
Location: CA
Member`s Gallery
Posts: 3,454
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I ran the nv5600 over 800 hp/8000 lbs sled pulling, and never had an issue. The nv5600 doesn't shift as quick as a g56. In a 2wd, you could probably get away with any of them.
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04-28-2011, 11:56 AM
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#19
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Name: TexasEOD
Title: 12s club... with the G8.
Status: Not Here
Join Date: Apr 2011
Location: Central Texas is home, Missouri is where Im lost...
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Posts: 26
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sorry to hijack, but would a NV5600 hold up to occasional track runs and daily drive at 500-600hp?
how much is a zf6 swap and has anyone on here done it in a 3rd gen?
Im looking for a 6 speed since thats what I wanted originally and I dont feel like spending 6G+ on an auto...
__________________
05 2500 auto 4x4 QCSB/road armor/recon cab lights/edge J/A/ISSPRO gauges/straight pipe/H2's with 35" Hankooks... Lookin for a 6 speed!
09 G8 MGM/blacked out...
"Initial success or total failure" Its a way of life...
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05-23-2011, 06:40 AM
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#20
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Name: KeyWrench
Title: Rookie
Status: Not Here
Join Date: Apr 2011
Location: Connecticut
Member`s Gallery
Posts: 15
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Quote:
Originally Posted by ENafziger
Since the D350 is going to be a couple thousand pounds later than any of the later model quad cab 4x4s, I'd say either the NV5600 or the G56 would be fine. From what I understand, the main concern with the G56 is case flex, since it's aluminum. Mike at Lazarsmith offers a good looking girdle to address this.
I have run a G56 for just over 100k miles, much of the time at the 625 - 650 hp level. My truck weighs in at 9025 pounds empty, and I've not had any problems.
That being said, if your mating the G56 to a 12-valve, the more heavily biased low rpm torque pounding may not make the transmission very happy.
--Eric
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The G56 case will flex under high performance applications. Lazarsmith's Tork-Shield is a functional work of art which obviates case flex and can be installed with the transmission on or off the truck. Mike also offers custom internal modifications and enhancements according to your needs and budget. Check out the website or give him a call.
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